Resonances in rotationally inelastic scattering of NH and ND with H

We present theoretical studies on the scattering resonances in rotationally inelastic collisions of NH and ND molecules with H molecules. We use the quantum close-coupling method to compute state-to-state integral and differential cross sections for the NH/ND-H system for collision energies between 5 and 70 cm, using a previously reported potential energy surface [Maret et al., Mon. Not. R. Astron. Soc. 399, 425 (2009)]. We identify the resonances as shape or Feshbach resonances. To analyze these, we use an adiabatic bender model, as well as examination at the scattering wave functions and lifetimes. The strength and width of the resonance peaks suggest that they could be observed in a crossed molecular beam experiment involving a Stark-decelerated NH beam.